Ncert Exercises & Solutions

An EM wave of intensity \(I\) falls on a surface kept in a vacuum and exerts radiation pressure \(P\) on it. Which of the following are true?

(a)	Radiation pressure is \(\frac{I}{c}\) if the wave is totally absorbed.
(b)	Radiation pressure is \(\frac{I}{c}\) if the wave is totally reflected.
(c)	Radiation pressure is \(\frac{2I}{c}\) if the wave is totally reflected.
(d)	Radiation pressure is in the range \(\frac{I}{c}<P<\frac{2I}{c}\) for real surfaces.

Choose the correct one from the given options:

1.	a, b and c	2.	b, c and d
3.	a, c and d	4.	c and d